Search Publications
Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy γ-rays
Maraschi, L.; Covino, S.; Antonelli, L. A. +156 more
Aims: The radio galaxy
Methods…
The VLT-FLAMES Tarantula Survey. XIII: On the nature of O Vz stars in 30 Doradus
Herrero, A.; Simón-Díaz, S.; Puls, J. +13 more
Context. O Vz stars, a subclass of O-type dwarfs characterized by having He ii λ4686 stronger in absorption than any other helium line in their blue-violet spectra, have been suggested to be on or near the zero-age main sequence (ZAMS). If their youth were confirmed, they would be key objects with which to advance our knowledge of the physical pro…
Accelerated post-AGB evolution, initial-final mass relations, and the star-formation history of the Galactic bulge
Zijlstra, A. A.; Hajduk, M.; Gesicki, K. +1 more
Aims: We study the star-formation history of the Galactic bulge, as derived from the age distribution of the central stars of planetary nebulae that belong to this stellar population.
Methods: The high resolution imaging and spectroscopic observations of 31 compact planetary nebulae are used to derive their central star masses. We use th…
The Herschel Exploitation of Local Galaxy Andromeda (HELGA). IV. Dust scaling relations at sub-kpc resolution
Blommaert, J. A. D. L.; Ciesla, L.; Boquien, M. +18 more
Context. Dust and stars play a complex game of interactions in the interstellar medium and around young stars. The imprints of these processes are visible in scaling relations between stellar characteristics, star formation parameters, and dust properties.
Aims: In the present work, we aim to examine dust scaling relations on a sub-kpc resolu…
Planck intermediate results. XIV. Dust emission at millimetre wavelengths in the Galactic plane
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +192 more
We use Planck HFI data combined with ancillary radio data to study the emissivity index of the interstellar dust emission in the frequency range 100-353 GHz, or 3-0.8 mm, in the Galactic plane. We analyse the region l = 20°-44° and |b| ≤ 4° where the free-free emission can be estimated from radio recombination line data. We fit the spectra at each…
CLASH-VLT: The stellar mass function and stellar mass density profile of the z = 0.44 cluster of galaxies MACS J1206.2-0847
Demarco, R.; Infante, L.; Grillo, C. +29 more
Context. The study of the galaxy stellar mass function (SMF) in relation to the galaxy environment and the stellar mass density profile, ρ⋆(r), is a powerful tool to constrain models of galaxy evolution.
Aims: We determine the SMF of the z = 0.44 cluster of galaxies MACS J1206.2-0847 separately for passive and star-forming (SF) gal…
On the formation of Mg ii h and k lines in solar prominences
Heinzel, P.; Vial, J. -C.; Anzer, U.
Aims: With the recent launch of the IRIS mission, it has become urgent to develop the spectral diagnostics using the Mg ii resonance h and k lines. In this paper, we aim to demonstrate the behavior of these lines under various prominence conditions. Our results serve as a basis for analysis of new IRIS data and for more sophisticated prominen…
The first Frontier Fields cluster: 4.5 µm excess in a z ~ 8 galaxy candidate in Abell 2744
Kneib, J. -P.; Pérez-Fournon, I.; Schaerer, D. +10 more
Aims: We present in this letter the first analysis of a z ~ 8 galaxy candidate found in the Hubble and Spitzer imaging data of Abell 2744 as part of the Hubble Frontier Fields legacy program.
Methods: We applied the most commonly used methods to select exceptionally high-redshift galaxies by combining non-detection and color criteria usi…
Gaia photometry for white dwarfs
Jordi, C.; Luri, X.; Carrasco, J. M. +5 more
Context. White dwarfs can be used to study the structure and evolution of the Galaxy by analysing their luminosity function and initial mass function. Among them, the very cool white dwarfs provide the information for the early ages of each population. Because white dwarfs are intrinsically faint only the nearby (~ 20 pc) sample is reasonably comp…
The first submillimeter observation of CO in the stratosphere of Uranus
Fletcher, L. N.; Hartogh, P.; Lellouch, E. +8 more
Context. Carbon monoxide (CO) has been detected in all giant planets and its origin is both internal and external in Jupiter and Neptune. Despite its first detection in Uranus a decade ago, the magnitude of its internal and external sources remains unconstrained.
Aims: We targeted CO lines in Uranus in the submillimeter range to constrain its…